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Microwave-assisted furfural production using hectorites and fluorohectorites as catalysts

  • Identification data

    Identifier: imarina:5874183
    Authors:
    Sánchez VDafinov ASalagre PLlorca JCesteros Y
    Abstract:
    © 2019 by the authors. Licensee MDPI, �Basel, Switzerland. It has previously been reported that the use of microwave heating, together with the presence of co-solvents, improves the efficiency of furfural production from biomass. Solid acid catalysts can be a good alternative to mineral acids, since they can prevent corrosion and can be reused. However, the formation of humines should be minimized. Several delaminated and fluorinated hectorites, with different types and strengths of acid sites, were synthesized and tested as catalysts for the production of furfural from commercial xylose and from an acid biomass extract of almond shells. A new methodology was developed to prepare crystalline fluorohectorite at 800◦ C in just 3 h. The presence of F significantly increased the acidity strength in the protonated fluorohectorite (H-FH) taking into account its high ammonia desorption temperature (721◦ C). Additionally, this sample had fourteen times higher total acidity by m2 than the reference H-βeta acid catalyst. H-FH was the most efficient catalyst at short reaction times (1 h) for the transformation of xylose to furfural under microwaves using toluene as co-solvent, regardless of whether the xylose was commercial (20% furfural yield) or an extract of almond shells (60% furfural yield). However, the acidity of the extract affected the fluorohectorite structure and composition.
  • Others:

    Author, as appears in the article.: Sánchez V; Dafinov A; Salagre P; Llorca J; Cesteros Y
    Department: Química Física i Inorgànica
    URV's Author/s: Cesteros Fernández, Yolanda / Dafinov, Anton Ivanov / Salagre Carnero, María Pilar
    Keywords: Xylan Solid-acid Organic-acids Microwaves Liquid-phase dehydration Heterogeneous catalysis Green chemistry Glucose Furfural Fructose Fluorohectorite D-xylose Conversion Clays Chemistry Biphasic system Biomass
    Abstract: © 2019 by the authors. Licensee MDPI, �Basel, Switzerland. It has previously been reported that the use of microwave heating, together with the presence of co-solvents, improves the efficiency of furfural production from biomass. Solid acid catalysts can be a good alternative to mineral acids, since they can prevent corrosion and can be reused. However, the formation of humines should be minimized. Several delaminated and fluorinated hectorites, with different types and strengths of acid sites, were synthesized and tested as catalysts for the production of furfural from commercial xylose and from an acid biomass extract of almond shells. A new methodology was developed to prepare crystalline fluorohectorite at 800◦ C in just 3 h. The presence of F significantly increased the acidity strength in the protonated fluorohectorite (H-FH) taking into account its high ammonia desorption temperature (721◦ C). Additionally, this sample had fourteen times higher total acidity by m2 than the reference H-βeta acid catalyst. H-FH was the most efficient catalyst at short reaction times (1 h) for the transformation of xylose to furfural under microwaves using toluene as co-solvent, regardless of whether the xylose was commercial (20% furfural yield) or an extract of almond shells (60% furfural yield). However, the acidity of the extract affected the fluorohectorite structure and composition.
    Thematic Areas: Química Physical and theoretical chemistry Farmacia Environmental science (all) Engenharias ii Ciências biológicas ii Chemistry, physical Catalysis Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 20734344
    Author's mail: pilar.salagre@urv.cat yolanda.cesteros@urv.cat anton.dafinov@urv.cat anton.dafinov@urv.cat
    Author identifier: 0000-0003-3257-2022 0000-0002-5439-9358 0000-0002-6124-3095 0000-0002-6124-3095
    Record's date: 2023-02-18
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.mdpi.com/2073-4344/9/9/706
    Papper original source: Catalysts. 9 (9):
    APA: Sánchez V; Dafinov A; Salagre P; Llorca J; Cesteros Y (2019). Microwave-assisted furfural production using hectorites and fluorohectorites as catalysts. Catalysts, 9(9), -. DOI: 10.3390/catal9090706
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.3390/catal9090706
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2019
    Publication Type: Journal Publications
  • Keywords:

    Catalysis,Chemistry, Physical,Physical and Theoretical Chemistry
    Xylan
    Solid-acid
    Organic-acids
    Microwaves
    Liquid-phase dehydration
    Heterogeneous catalysis
    Green chemistry
    Glucose
    Furfural
    Fructose
    Fluorohectorite
    D-xylose
    Conversion
    Clays
    Chemistry
    Biphasic system
    Biomass
    Química
    Physical and theoretical chemistry
    Farmacia
    Environmental science (all)
    Engenharias ii
    Ciências biológicas ii
    Chemistry, physical
    Catalysis
    Astronomia / física
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